Question: Tell me the major party which holds the office as head of the organisation by the chairman of the Social Democratic Party and whose name contains the word democratic?
Paraphrase: Tell me the big party that the chairman of the Social Democratic Party holds the office as head of the organization and whose name contains the word democracy?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q6738353 . ?sbj wdt:P2388 wd:Q29576752 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'democratic')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Social Democratic Party of Germany, Social Democratic Party of Germany